Reamer



Dec. 9, 1941.

H. G. CAMPBELL REAMER Filed Sept. 14, 1940 ii a. Campbell IN V EN TOR.

A TTORNEYS.

Patented Dec. 9, 1941 UNITED STTES FTE 1 Claim.

This invention aims to provide novel means for straightening asubstantially vertical hole in the earth, for example a well hole, whichhas been bored in a crooked or sinuous form. Another object of theinvention is to supply a tool of the class described, which may be takendown readily for repair, replacement, or to permit the cutters to beresharpened.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the presentinvention appertains.

With the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawing:

Fig. 1 shows in side elevation, a tool constructed in accordance withthe invention;

Fig. 2 is a cross section on the line 22 of Fig. 1;

Fig. 3 is a longitudinal section on an enlarged scale, wherein parts arebroken away;

Fig. 4 is a side elevation showing a modification, parts being brokenaway.

In carrying out the invention, there is provided an elongated body I,preferably but not necessarily of circular cross section, the body beingsupplied at its lower end with an enlarged foot 2. Near its upper end,the body I is equipped with a threaded neck 3 carrying a wrench head 4,the wrench head being surmounted by a reduced cylindrical stem 5,carrying a tapered and threaded tip 6, adapted for connection with aline or other instrumentality whereby the tool may be raised and loweredin a hole, for instance a well hole.

Cutters 1, 8 and 9 are mounted removably on the body I, the cutter Ibeing a lower cutter, the cutter 8 being an intermediate cutter, and thecutter 9 being an upper cutter. Tubular sleeves or spacers ID aremounted removably on the body I, between the cutters 18 and 8-9. It willbe understood that the body I may be of any desired length, there beingas many or as few of the cutters l89 and the corresponding spacers IE],as occasion may demand. The uppermost cutter 9 is engaged by a nut Hthreaded on the neck 3, the wrench head 4 constituting means for holdingthe body I against rotation, whilst the nut H is being set down againstthe uppermost cutter 3, to bind the cutters and spacers togethertightly, with the lowermost cutter i in engagement with the foot 2.

The cutters 'l-89 are like and are interchangeable. They are offrvsto-conical form and taper upwardly, to define a circumferentialcutting or reaming edge 2 at the lower end of the cutter. The cutters I,8 and 9 are provided in their peripheries with notches l4, disposedlongitudinally of the body i and extended inwardly beyond theperipheries of the cutters at the upper ends of the cutters. The notchesI4 permit the passage of water, gas, oil and the like, as the tool isbeing lowered into a well or is being reciprocated therein.

In Fig. 4, parts hereinbefore described have been designated by numeralsalready used, with the suffix a. The modification consists in formingthe tool as a one piece structure, rather than resorting to thetake-down construction hereinbefore described.

A cable or the like is made fast to the tip 6, the tool is reciprocatedin a hole, and the hole, if crooked, will be straightened out in a waywhich will be understood readily by those skilled in the art.

Having thus described the invention, what is claimed is:

A tool for straightening an earth-hole, comprising an elongated body,provided in its upper portion with a threaded neck, a nut on the neck, apolygonal wrench head surmounting the neck and located immediatelyadjacent to the nut, to facilitate the holding of the body whilst thenut is being rotated, means carried by the wrench head for connectingthe body to a raising and lowering device, the body being provided atits lower end with an enlarged, blunted, button-like foot, constitutingthe lowermost portion of the body, and alternating cutters and tubularspacers on the body, located removably between the nut and the foot, thecutters being of frusto-conical form, in the interest of strength, andto form reaming edges at the lower ends of the cutters.

HARRY G. CAMPBELL.

